Fire-lining



(No Model.) S G. "WELLHQUSE.

FIRE LINING.

No. 350,331. Patented Oct. 5, 1886..

lllll 'A'I-IIIII llllllillllllll UNIT D STATES PATENT OFFICE.

GEORGE WELLHOUSE, OF AKRON, OHIO.

FIRE-LINING.

SPECIFICATION forming part of Letters Patent No..350,331, dated October5, 1886 Application filed March 31, 1886. Serial No. 197,367. (Nomodel.)

exact description of the invention, such as will enable others skilledin the art to which it pertains to make and use the same.

My invention .relates to improvements in fire-lining in which metalbacking is cast upon a fire-brick, the latter being of suitable refrac-,

tory material thoroughly burned, and having two or more opposite bevelededges,is laid in a mold and the backing cast on the latter, havingprojecting lugs or fingers cast undercut bycontact with the bevelededges of the brick, to

the end that the shrinkage of the backing in casting causes the fingersor lugs to grip the edges of the brick, by means of which the brick isfirmly held and cannot easily be broken,'cracked, or removed, and byreason of the fingers being separated from each other a broken surfaceis presented to the heat, and the metal backing is not warped.Heretofore a continuous frame, or a backing with a continuous rib caston, has been made to inclose the edges of the brick. The difficulty wasthat the unbroken surface of metal thus exposed in use to the fire wouldexpand and warp with the heat and remain warped, by reason of which,instead of protecting the brick, the latter was likely to be broken,cracked, or loosened by such warping and expansion of the frame or rimof the backing.

With my improved construction the fingers, as aforesaid, present abroken surface, the same being separated some little distance from eachother, and as only the ends or front por tions of the fingers areexposed, the backing being protected by the fire-brick, does not warp,and consequently holds the brick not only firmly, but prevents thefracture of the brick to such an extent that blows delivered on the faceof the brick have little effect, the latter being so firmly held by thelateral pressure of the fingers.

With my improved fire-lining, after months of hard usage, the fire-brickcannot well be removed except by chipping itQout with a coldchisel orother tool. i

In the accompanying drawings, Figure 1 is a plan view of my improvedfire-lining, por- A represents the fire-brick, that may be of anydesired size or form and of any suitable refractory material, the samehaving been previously burned, and having two or more opposite edges, a,beveled. The brick thus prepared is laid in a mold and a metal backing,B, is cast on, the broader face of the brick being next the metallining. Fingers or lugs b are cast integral with plate B, and'as thesefingers abut the beveled edges of the brick they are of course'cast withundercut edges, that with the corresponding edges of the brick form adovetail. The plate 13 shrinks in cooling, and causes the fingers tograsp the edges of the brick with great force, the lateral pressureinward of the fingers on the edges of the brick being such that it isdifficult to break, crack, or remove the brick. The front of the fingersare of course exposed to the heat, but the expansion of the same doesnot materially affect the plate B, which, by reason of its beingprotected by the fire-brick in front of it, does not become heatedenough to warp it. If, instead of fingers,a continuous rib were hadalong the edge of the brick, such rib, when heated, would expand to sucha degree that the back plate would be warped, .and would remain warped,and in such c0ndition,instead of protecting the brick,would cause extrastrain on the latter, by reason of which slight blows delivered on theface of the brick, suchas are likely to occur in ordinary usage, wouldsoon breaker crack the brick and render i worthless.

What I claim is A fire-lining consisting,essentially,of a fire brickhaving beveled edges diverging outward, and a metal lining cast upon theouter surface of the brick, and formed with fingers overlapping oppositeedges of the brick, substantially as set forth.

In testimony whereof I sign this specification,in the presence of twowitnesses, this 24th day of March, 1886.

GEORGE WELLHOUSE. Witnesses:

H. PERKINS, O. R. GRANT.

